BJT Amplifiers and Oscillators MCQs

Question 1

Considering

Accepted Answer

as current gain of an amplifier in CB configuration and

Answer

as current gain in CE configuration

Question 2

Voltage gain of an amplifier in common base configuration is

Accepted Answer

the maximum of all the three configurations

Answer

always less than one

Answer

unity

Answer

the least of all types

Question 3

One of the following configuration has the highest current gain

Accepted Answer

CC (commone collector)

Answer

CB (common base)

Answer

CE (common emitter)

Answer

Emitter Follower

Question 4

The configuration that has the highest input impedance could be

Accepted Answer

common collector

Answer

common base

Answer

common emitter

Answer

none of these

Question 5

The configuration that can be used as a constant current source is

Accepted Answer

common base

Answer

common emitter

Answer

common collector

Answer

none of these

Question 6

Configuration used to connect high impedance to source to a low impedance load is

Accepted Answer

common collector

Answer

common emitter

Answer

common emitter

Answer

either common base or common collector

Question 7

The most commonly employed configuration in bipolar transistor amplifiers is the

Accepted Answer

common emitter

Answer

common base

Answer

common collector

Answer

none of these

Question 8

Configuration characterised by very low output impedance is

Accepted Answer

common collector (CC)

Answer

common emitter (CE)

Answer

common base (CB)

Answer

none of these

Question 9

Power gain is maximum in CE configuration when it is neither possessed by maximum voltage gain nor by maximum current gain. Why?

Accepted Answer

Because, it has both voltage gain and current gain greater than unity

Answer

It is its inherent characteristic

Answer

It has a very high resistance gain

Answer

none of these